It appears to be self-renewing, since Tony depletes it almost to 0% when fighting Iron Monger and then a few minutes later is charged up enough to resume fighting, so once it's manufactured the operating costs are minimal.

However, given that Tony was able to build a decently-effective one in a cave from missile parts, it is odd to say that it's not cost-effective. The real question in that case might be 'what is the per-hour operating cost of the Iron Man suit?' The Arc Reactor is ideal for Tony because he needs a monumental amount of energy in a very tiny container, but according to that exchange it wouldn't work for any normal real-world energy usage by someone who has to actually pay for things. We built that thing to shut the hippies up! The arc reactor, that's a publicity stunt! Tony, come on. What If Fiction ( This is the best place for 'general' questions)Р”Р‡or non-serious answers for real world science problems try:Р”Р„nd just for fun, don't forget to check out our friends at Who would win ( Go here for questions about who would win in a fight or competition between two or more characters) This subreddit is for discussion of fiction using information about the universe and not meta information about the work.

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Iron man 2 arc reactor